Hmm sounds like a problem we had a little while back even though I thought we fixed it, but thanks for letting us know! If you'd be so kind could you elaborate a little?: how powerful would you say your computer is?
You'd be doing me a massive favour if you could open up the game's files and go to this directory: ApothalypseDemoV1\Apothalypse_Data\StreamingAssets and tell me if you see a folder there called SaveFiles and if so what is in it?
No pressure if you can't, thanks for letting us know either way :)